AFP: Aeronautical authorities on Friday confirmed world records for a Swiss solar-powered aircraft that flew around the clock in July, including those for the longest and highest flight by such an aircraft. Solar Impulse was credited with the longest flight in the category of solar powered aeroplanes, by staying aloft for 26 hours, 10 minutes and 19 seconds, the International Aeronautical Federation (FAI) said. It also set an altitude record by flying at 9,235 metres (30,298 feet), and a record…